Choose the correct letter, A, B or C. One reason why Jim and Jane felt unsatisfied about the theories discussed in the lecture

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问题 Choose the correct letter, A, B or C.
One reason why Jim and Jane felt unsatisfied about the theories discussed in the lecture was that

选项 A、governments didn’t increase any spending on them.
B、most theories had nothing to do with the exams.
C、many theories lacked solid proof in the field.

答案C

解析 本题出题句为“The theories discussed in our lectures,like Simpson’s and Grey’s,are sovague and lack proof,so I don’t understand why we even study them.”其中“vague”意为“模糊的,含糊的”,“lack proof”意为“缺乏证据”,故本题选C:本领域的许多理论缺乏充足的证据。
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